Clutch.



F. RALLEN.

CLUTGH.

APPLIUATION FILED APR. za, 1911.

1,025,043. Patented A111136, 1912.

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UNITED sTATEs* PATENT oEEIcE. 'i

FEED E. ALLEN, or PROVIDENCE, RHODE ISLAND, AssmNoE To EUGENE E. BoWEN,

F PROVIDENCE, RHODE ISLAND.

CLUTCH.

Specication of Letters Patent.

Patentedapr. 3o, 1912.

Application filed April 28, 1911. Serial No. 623,925.

To all whom t may concern.

Be it known that I, FRED R. ALLEN, a citizen' of the United States, andresident of Providence, in the county of. Providence vand State of RhodeIsland', have inventedV certain new and useful Improvements in Clutches,of which the following is a speciiication.

This invention has reference to clutches, its object being to provide aclutch of simple and Ainexpensive construction that is absolutelypositive in its action even while operating at high speed, said clutchbeing adapted to readily connect and disconnect different movable parts.i

IVith these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described andparticularly pointed vout in the appended claims.

In the accompanying drawings: Figure 1- is a front elevation of myimproved clutch partly in section. Fig. 2- is a side elevation of myclutch partly in section. Fig. 3 is a front view of the toothed clutchmember. Fig. 4fshows a side viewof the pawl in detail. v i

Referring to the drawings a `dog 4 is-pivotally connected at 5 in arecess or slot 6 formed in the periphery of the cup-shaped y clutchmember 7. This dog has an outwardly extending finger 3 and a laterallyextending toe 8, said toe entering a notch 9 in the end of a pawl 10.This pawl is also pivotally connected at 11 in an extension of said slot6 to the clutch member 7 and has its heel 12 pressed outwardly by aspring 13. The tip 14 of this pawl 10 is adapted to coact with eitherone of aplurality of teeth 15 of the toothed clutch member 23, the hub16 of which is secured toa shaft 17 that is in alinement with the shaft18 on which the clutch member 7 is`secured. In this particular case itis assumed that the shaft 17 is the driver and is running constantly andtransmits its motion when desired through the clutch members to shaft181 In practice any suitable mechanism mayv be employed for engaging thedog .4 and causing the pawl to release the toothed member 23, but forconvenience I have shown an arm or tripper 21 pivotally held at 20, thesame being adapted to serve as a stop or barrier to be moved manually orotherwise into the path of the dog finger '3 during a revolution of theclutch, whereby the pawl 10 is withdrawn from engagement with the toothin the toothed member 2.3. immediately releasing the driven member 7thereby permitting the driven shaft 18 to stop while the driverv17continues to rotate until such time as the stop arm or tripper isremoved to permit the .pawl to again engage the toothed member when thewhole will resume its'rotation in unison. In other words, ythe pawl 1()serves to normally connect together both Athe driven and driving membersof the clutch so that theywill rotate in unison which condition`continues to exist until the tripper varm 21 is moved into the path ofrotation of the extending finger 3 of the dog 4, thereby causing the dogto raise the pawl to release the driven from the driving member andpermit the former to at once stop while the latter member continues torevolve.

The device is extremely simple and inexpensive in construction andabsolutely positive in its action, and these clutch members may beoperatively connected and disconnected during any predetermined portionof a'single revolution, or at intervals of any numberof revolutions ofthe members as may be desired.

I claim:

1. The combination with two shafts in alinement, of a clutch membercarried by each,' one of said members having a peripheral tooth, theother of said members carrying a spring pressed pawl adapted to engageSaid tooth and also carrying a dog for controlling the position of saidpawl, and al movable tripper adapted to engage said dog disengagesaidpawl and stop the dog carrying member. Y

2.Thev combination with two shafts i-nalinement of a socket clutchmember carried by one shaft, a toothedl clutch member carried by theother shaft and 'extending into the socketv of the first named member, a

springactuated pawl carried by the socket member carriedby the othershaft and extending into the socket of the first named member, a pawl,and a dogb'oth operatively mounted and substantilly inciosed in the rimof said socket member, said pan-'1 adapted to engage the toothed memberand said dog adapted to control the position of said pawl, the latteralso having a member projecting beyond the face of its;"supporting l0member, and aV movable trpper adapted to extend into. the path of" saidprojection to 'move said dog to disengnge the pawb and in presence oftwo witnesses.

FRED R. ALLEN.

Witnesses f HOWARD E. BARLOW, E. i. OGDEN.

